Preparation and characterization of fluorescent polysulfate based on fluorescein

Abstract

Fluorescent polysulfate （PSE-FL） was prepared by condensation polymerization of bisphenol A （BA）, propane-2,2-diyl bis（4,1-phenylene） bis（sulfurofluoridate） and fluorescein in high temperature solution, and its structure and fluorescence characteristics were investigated. The results showed that the number average molecular weight of the prepared PSE-FL was 33 413 g/mol, the weight average molecular weight was 55 043 g/mol and the molecular weight distribution index was 1.64. It was a typical amorphous polymer with decomposition temperature about 319 ℃ and a glass transition temperature about 128 ℃. The solid ultraviolet absorption test results showed that PSE-FL had the maximum absorption wavelength at 502 nm and the fluorescence emission spectrum showed that PSE-FL displayed the fluorescence emission wavelength at 554 nm.

Keywords

• polysulfate
• sulfur and fluorine exchange reaction
• fluorescein
• click chemistry
• fluorescent polysulfate
• fluorescence characteristics